Modeling and Characterizing Transient Behavior of Distillation Columns with Travelling Wave Theory

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Hemmati Alam, Narjes | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39163 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Pishvaie, Mahmoud Reza
Abstract:
Simulation and controlling nonlinear process is one of the challenging problems in academic and industrial research. Saving data for keeping history of process or arising number of calculation for optimization in control design, is forcing to decrease number of equation or order of system. One of the methods to decrease the order of distillation process is using the travelling wave theory. This solution shows god accuracy for simulation the behavior of distillation column. On the other hand finite difference method as a solver for distillation equation takes some time to converge to steady state condition and the numbers of calculation in this method are high. Finite difference method is also depended on the value of sample time. One of the other solutions is orthogonal collocation method, it’s not on sample time depended and the numbers of calculation for this method are less than finite difference method. This method shows nearer output to the real system output .But the wave model is more logical to be used for optimization algorithm
Keywords:
Finite Difference Method ; Traveling Wave ; Orthogonal Collocation ; Distillation Column ; Packed Bed Column ; Tray Columns

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